Self-Heating Battery Could Help Drive EVs to Cold Climates

Self-Heating Battery Could Help Drive EVs to Cold Climates
Jun-29-18
Researchers have created a self-heating car battery that can recharge quickly even in freezing conditions.

Developed by a team from Penn State, the battery could be particularly useful in bringing more electric vehicles to colder climates, since typical lithium-ion batteries cannot be quickly charged at temperatures below 50°F.

The new battery from Penn State is equipped with a bit of thin nickel foil that attaches to the negative terminal and extends outside the cell to create a third terminal. When the ambient temperature falls to around 77°F, a temperature sensor will trigger a circuit to flow through the foil, causing electrical resistance that heats the foil and warms the battery. Then, when the temperature reaches above 77°F, the system will automatically divert the current, so that flows into the battery and charges it.

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